The little book, with the camouflage cover, is everywhere. There are more than 50,000 copies with the troops in Iraq and Afghanistan. It’s on military bases across America. It’s in the homes of military families, who are praying their dear ones come home. It’s circulating at the Pentagon. Even the president has allegedly read it. “An aide to President Bush called me and said, ‘Henry, I think you’d like to know that the president is on his face before God every morning, and he’s using your [book]’,” its author told NEWSWEEK. The author is Henry Blackaby, a 72-year-old Canadian minister who is largely unknown outside Christian circles and who wrote the book together with his son Richard more than a decade ago. The book is the ever popular guide to prayer called “Experiencing God Day by Day.”